Nortel VPN client 5.01 stores the cleartext password in the memory of the Extranet.exe process, which could allow local users to obtain sensitive information.
https://exchange.xforce.ibmcloud.com/vulnerabilities/19791
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-0845
http://www.nta-monitor.com/news/vpn-flaws/nortel/nortel-client/